dash/qa/rpc-tests/fundrawtransaction.py

#!/usr/bin/env python3
# Copyright (c) 2014-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *

# Create one-input, one-output, no-fee transaction:
class RawTransactionsTest(BitcoinTestFramework):

    def __init__(self):
        super().__init__()
        self.setup_clean_chain = True
        self.num_nodes = 4

    def setup_network(self, split=False):
        self.nodes = start_nodes(self.num_nodes, self.options.tmpdir, [['-usehd=0'], ['-usehd=0'], ['-usehd=0'], ['-usehd=0']])

        connect_nodes_bi(self.nodes,0,1)
        connect_nodes_bi(self.nodes,1,2)
        connect_nodes_bi(self.nodes,0,2)
        connect_nodes_bi(self.nodes,0,3)

        self.is_network_split=False
        self.sync_all()

    def run_test(self):
        print("Mining blocks...")

        min_relay_tx_fee = self.nodes[0].getnetworkinfo()['relayfee']
        # This test is not meant to test fee estimation and we'd like
        # to be sure all txs are sent at a consistent desired feerate
        for node in self.nodes:
            node.settxfee(min_relay_tx_fee)

        # if the fee's positive delta is higher than this value tests will fail,
        # neg. delta always fail the tests.
        # The size of the signature of every input may be at most 2 bytes larger
        # than a minimum sized signature.

        #            = 2 bytes * minRelayTxFeePerByte
        feeTolerance = 2 * min_relay_tx_fee/1000

        self.nodes[2].generate(1)
        self.sync_all()
        self.nodes[0].generate(121)
        self.sync_all()

        watchonly_address = self.nodes[0].getnewaddress()
        watchonly_pubkey = self.nodes[0].validateaddress(watchonly_address)["pubkey"]
        watchonly_amount = Decimal(2000)
        self.nodes[3].importpubkey(watchonly_pubkey, "", True)
        watchonly_txid = self.nodes[0].sendtoaddress(watchonly_address, watchonly_amount)
        self.nodes[0].sendtoaddress(self.nodes[3].getnewaddress(), watchonly_amount / 10)

        self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 15)
        self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 10)
        self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 50)

        self.nodes[0].generate(1)
        self.sync_all()

        ###############
        # simple test #
        ###############
        inputs  = [ ]
        outputs = { self.nodes[0].getnewaddress() : 10 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        assert(len(dec_tx['vin']) > 0) #test if we have enought inputs

        ##############################
        # simple test with two coins #
        ##############################
        inputs  = [ ]
        outputs = { self.nodes[0].getnewaddress() : 22 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        assert(len(dec_tx['vin']) > 0) #test if we have enough inputs

        ##############################
        # simple test with two coins #
        ##############################
        inputs  = [ ]
        outputs = { self.nodes[0].getnewaddress() : 26 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        assert(len(dec_tx['vin']) > 0)
        assert_equal(dec_tx['vin'][0]['scriptSig']['hex'], '')


        ################################
        # simple test with two outputs #
        ################################
        inputs  = [ ]
        outputs = { self.nodes[0].getnewaddress() : 26, self.nodes[1].getnewaddress() : 25 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        totalOut = 0
        for out in dec_tx['vout']:
            totalOut += out['value']

        assert(len(dec_tx['vin']) > 0)
        assert_equal(dec_tx['vin'][0]['scriptSig']['hex'], '')


        #########################################################################
        # test a fundrawtransaction with a VIN greater than the required amount #
        #########################################################################
        utx = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 50:
                utx = aUtx
                break

        assert(utx!=False)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
        outputs = { self.nodes[0].getnewaddress() : 10 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        totalOut = 0
        for out in dec_tx['vout']:
            totalOut += out['value']

        assert_equal(fee + totalOut, utx['amount']) #compare vin total and totalout+fee


        #####################################################################
        # test a fundrawtransaction with which will not get a change output #
        #####################################################################
        utx = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 50:
                utx = aUtx
                break

        assert(utx!=False)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
        outputs = { self.nodes[0].getnewaddress() : Decimal(50) - fee - feeTolerance }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        totalOut = 0
        for out in dec_tx['vout']:
            totalOut += out['value']

        assert_equal(rawtxfund['changepos'], -1)
        assert_equal(fee + totalOut, utx['amount']) #compare vin total and totalout+fee


        ####################################################
        # test a fundrawtransaction with an invalid option #
        ####################################################
        utx = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 50:
                utx = aUtx
                break

        assert_equal(utx!=False, True)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
        outputs = { self.nodes[0].getnewaddress() : Decimal(40) }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])

        try:
            self.nodes[2].fundrawtransaction(rawtx, {'foo': 'bar'})
            raise AssertionError("Accepted invalid option foo")
        except JSONRPCException as e:
            assert("Unexpected key foo" in e.error['message'])


        ############################################################
        # test a fundrawtransaction with an invalid change address #
        ############################################################
        utx = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 50:
                utx = aUtx
                break

        assert_equal(utx!=False, True)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
        outputs = { self.nodes[0].getnewaddress() : Decimal(40) }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])

        try:
            self.nodes[2].fundrawtransaction(rawtx, {'changeAddress': 'foobar'})
            raise AssertionError("Accepted invalid dash address")
        except JSONRPCException as e:
            assert("changeAddress must be a valid dash address" in e.error['message'])



        ############################################################
        # test a fundrawtransaction with a provided change address #
        ############################################################
        utx = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 50:
                utx = aUtx
                break

        assert_equal(utx!=False, True)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
        outputs = { self.nodes[0].getnewaddress() : Decimal(40) }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])

        change = self.nodes[2].getnewaddress()
        rawtxfund = self.nodes[2].fundrawtransaction(rawtx, {'changeAddress': change, 'changePosition': 0})
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        out = dec_tx['vout'][0];
        assert_equal(change, out['scriptPubKey']['addresses'][0])



        #########################################################################
        # test a fundrawtransaction with a VIN smaller than the required amount #
        #########################################################################
        utx = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 10:
                utx = aUtx
                break

        assert(utx!=False)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
        outputs = { self.nodes[0].getnewaddress() : 10 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)

        # 4-byte version + 1-byte vin count + 36-byte prevout then script_len
        rawtx = rawtx[:82] + "0100" + rawtx[84:]

        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
        assert_equal("00", dec_tx['vin'][0]['scriptSig']['hex'])

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        totalOut = 0
        matchingOuts = 0
        for i, out in enumerate(dec_tx['vout']):
            totalOut += out['value']
            if out['scriptPubKey']['addresses'][0] in outputs:
                matchingOuts+=1
            else:
                assert_equal(i, rawtxfund['changepos'])

        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
        assert_equal("00", dec_tx['vin'][0]['scriptSig']['hex'])

        assert_equal(matchingOuts, 1)
        assert_equal(len(dec_tx['vout']), 2)


        ###########################################
        # test a fundrawtransaction with two VINs #
        ###########################################
        utx  = False
        utx2 = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 10:
                utx = aUtx
            if aUtx['amount'] == 50:
                utx2 = aUtx


        assert(utx!=False)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']},{'txid' : utx2['txid'], 'vout' : utx2['vout']} ]
        outputs = { self.nodes[0].getnewaddress() : 60 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        totalOut = 0
        matchingOuts = 0
        for out in dec_tx['vout']:
            totalOut += out['value']
            if out['scriptPubKey']['addresses'][0] in outputs:
                matchingOuts+=1

        assert_equal(matchingOuts, 1)
        assert_equal(len(dec_tx['vout']), 2)

        matchingIns = 0
        for vinOut in dec_tx['vin']:
            for vinIn in inputs:
                if vinIn['txid'] == vinOut['txid']:
                    matchingIns+=1

        assert_equal(matchingIns, 2) #we now must see two vins identical to vins given as params

        #########################################################
        # test a fundrawtransaction with two VINs and two vOUTs #
        #########################################################
        utx  = False
        utx2 = False
        listunspent = self.nodes[2].listunspent()
        for aUtx in listunspent:
            if aUtx['amount'] == 10:
                utx = aUtx
            if aUtx['amount'] == 50:
                utx2 = aUtx


        assert(utx!=False)

        inputs  = [ {'txid' : utx['txid'], 'vout' : utx['vout']},{'txid' : utx2['txid'], 'vout' : utx2['vout']} ]
        outputs = { self.nodes[0].getnewaddress() : 60, self.nodes[0].getnewaddress() : 10 }
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)
        assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        fee = rawtxfund['fee']
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
        totalOut = 0
        matchingOuts = 0
        for out in dec_tx['vout']:
            totalOut += out['value']
            if out['scriptPubKey']['addresses'][0] in outputs:
                matchingOuts+=1

        assert_equal(matchingOuts, 2)
        assert_equal(len(dec_tx['vout']), 3)

        ##############################################
        # test a fundrawtransaction with invalid vin #
        ##############################################
        listunspent = self.nodes[2].listunspent()
        inputs  = [ {'txid' : "1c7f966dab21119bac53213a2bc7532bff1fa844c124fd750a7d0b1332440bd1", 'vout' : 0} ] #invalid vin!
        outputs = { self.nodes[0].getnewaddress() : 10}
        rawtx   = self.nodes[2].createrawtransaction(inputs, outputs)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)

        try:
            rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
            raise AssertionError("Spent more than available")
        except JSONRPCException as e:
            assert("Insufficient" in e.error['message'])


        ############################################################
        #compare fee of a standard pubkeyhash transaction
        inputs = []
        outputs = {self.nodes[1].getnewaddress():11}
        rawTx = self.nodes[0].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[0].fundrawtransaction(rawTx)

        #create same transaction over sendtoaddress
        txId = self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 11)
        signedFee = self.nodes[0].getrawmempool(True)[txId]['fee']

        #compare fee
        feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
        assert(feeDelta >= 0 and feeDelta <= feeTolerance)
        ############################################################

        ############################################################
        #compare fee of a standard pubkeyhash transaction with multiple outputs
        inputs = []
        outputs = {self.nodes[1].getnewaddress():11,self.nodes[1].getnewaddress():12,self.nodes[1].getnewaddress():1,self.nodes[1].getnewaddress():13,self.nodes[1].getnewaddress():2,self.nodes[1].getnewaddress():3}
        rawTx = self.nodes[0].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[0].fundrawtransaction(rawTx)
        #create same transaction over sendtoaddress
        txId = self.nodes[0].sendmany("", outputs)
        signedFee = self.nodes[0].getrawmempool(True)[txId]['fee']

        #compare fee
        feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
        assert(feeDelta >= 0 and feeDelta <= feeTolerance)
        ############################################################


        ############################################################
        #compare fee of a 2of2 multisig p2sh transaction

        # create 2of2 addr
        addr1 = self.nodes[1].getnewaddress()
        addr2 = self.nodes[1].getnewaddress()

        addr1Obj = self.nodes[1].validateaddress(addr1)
        addr2Obj = self.nodes[1].validateaddress(addr2)

        mSigObj = self.nodes[1].addmultisigaddress(2, [addr1Obj['pubkey'], addr2Obj['pubkey']])

        inputs = []
        outputs = {mSigObj:11}
        rawTx = self.nodes[0].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[0].fundrawtransaction(rawTx)

        #create same transaction over sendtoaddress
        txId = self.nodes[0].sendtoaddress(mSigObj, 11)
        signedFee = self.nodes[0].getrawmempool(True)[txId]['fee']

        #compare fee
        feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
        assert(feeDelta >= 0 and feeDelta <= feeTolerance)
        ############################################################


        ############################################################
        #compare fee of a standard pubkeyhash transaction

        # create 4of5 addr
        addr1 = self.nodes[1].getnewaddress()
        addr2 = self.nodes[1].getnewaddress()
        addr3 = self.nodes[1].getnewaddress()
        addr4 = self.nodes[1].getnewaddress()
        addr5 = self.nodes[1].getnewaddress()

        addr1Obj = self.nodes[1].validateaddress(addr1)
        addr2Obj = self.nodes[1].validateaddress(addr2)
        addr3Obj = self.nodes[1].validateaddress(addr3)
        addr4Obj = self.nodes[1].validateaddress(addr4)
        addr5Obj = self.nodes[1].validateaddress(addr5)

        mSigObj = self.nodes[1].addmultisigaddress(4, [addr1Obj['pubkey'], addr2Obj['pubkey'], addr3Obj['pubkey'], addr4Obj['pubkey'], addr5Obj['pubkey']])

        inputs = []
        outputs = {mSigObj:11}
        rawTx = self.nodes[0].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[0].fundrawtransaction(rawTx)

        #create same transaction over sendtoaddress
        txId = self.nodes[0].sendtoaddress(mSigObj, 11)
        signedFee = self.nodes[0].getrawmempool(True)[txId]['fee']

        #compare fee
        feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
        assert(feeDelta >= 0 and feeDelta <= feeTolerance)
        ############################################################


        ############################################################
        # spend a 2of2 multisig transaction over fundraw

        # create 2of2 addr
        addr1 = self.nodes[2].getnewaddress()
        addr2 = self.nodes[2].getnewaddress()

        addr1Obj = self.nodes[2].validateaddress(addr1)
        addr2Obj = self.nodes[2].validateaddress(addr2)

        mSigObj = self.nodes[2].addmultisigaddress(2, [addr1Obj['pubkey'], addr2Obj['pubkey']])


        # send 12 DASH to msig addr
        txId = self.nodes[0].sendtoaddress(mSigObj, 12)
        self.sync_all()
        self.nodes[1].generate(1)
        self.sync_all()

        oldBalance = self.nodes[1].getbalance()
        inputs = []
        outputs = {self.nodes[1].getnewaddress():11}
        rawTx = self.nodes[2].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[2].fundrawtransaction(rawTx)

        signedTx = self.nodes[2].signrawtransaction(fundedTx['hex'])
        txId = self.nodes[2].sendrawtransaction(signedTx['hex'])
        self.sync_all()
        self.nodes[1].generate(1)
        self.sync_all()

        # make sure funds are received at node1
        assert_equal(oldBalance+Decimal('11.0000000'), self.nodes[1].getbalance())

        ############################################################
        # locked wallet test
        self.nodes[1].encryptwallet("test")
        self.nodes.pop(1)
        stop_nodes(self.nodes)
        wait_bitcoinds()

        self.nodes = start_nodes(self.num_nodes, self.options.tmpdir, [['-usehd=0'], ['-usehd=0'], ['-usehd=0'], ['-usehd=0']])
        # This test is not meant to test fee estimation and we'd like
        # to be sure all txs are sent at a consistent desired feerate
        for node in self.nodes:
            node.settxfee(min_relay_tx_fee)

        connect_nodes_bi(self.nodes,0,1)
        connect_nodes_bi(self.nodes,1,2)
        connect_nodes_bi(self.nodes,0,2)
        connect_nodes_bi(self.nodes,0,3)
        self.is_network_split=False
        self.sync_all()

        # drain the keypool
        self.nodes[1].getnewaddress()
        inputs = []
        outputs = {self.nodes[0].getnewaddress():1.1}
        rawTx = self.nodes[1].createrawtransaction(inputs, outputs)
        # fund a transaction that requires a new key for the change output
        # creating the key must be impossible because the wallet is locked
        try:
            fundedTx = self.nodes[1].fundrawtransaction(rawTx)
            raise AssertionError("Wallet unlocked without passphrase")
        except JSONRPCException as e:
            assert('Keypool ran out' in e.error['message'])

        #refill the keypool
        self.nodes[1].walletpassphrase("test", 100)
        self.nodes[1].walletlock()

        try:
            self.nodes[1].sendtoaddress(self.nodes[0].getnewaddress(), 12)
            raise AssertionError("Wallet unlocked without passphrase")
        except JSONRPCException as e:
            assert('walletpassphrase' in e.error['message'])

        oldBalance = self.nodes[0].getbalance()

        inputs = []
        outputs = {self.nodes[0].getnewaddress():11}
        rawTx = self.nodes[1].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[1].fundrawtransaction(rawTx)

        #now we need to unlock
        self.nodes[1].walletpassphrase("test", 100)
        signedTx = self.nodes[1].signrawtransaction(fundedTx['hex'])
        txId = self.nodes[1].sendrawtransaction(signedTx['hex'])
        self.nodes[1].generate(1)
        self.sync_all()

        # make sure funds are received at node1
        assert_equal(oldBalance+Decimal('511.0000000'), self.nodes[0].getbalance())

        ###############################################
        # multiple (~19) inputs tx test | Compare fee #
        ###############################################

        #empty node1, send some small coins from node0 to node1
        self.nodes[1].sendtoaddress(self.nodes[0].getnewaddress(), self.nodes[1].getbalance(), "", "", True)
        self.sync_all()
        self.nodes[0].generate(1)
        self.sync_all()

        for i in range(0,20):
            self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 0.01)
        self.nodes[0].generate(1)
        self.sync_all()

        #fund a tx with ~20 small inputs
        inputs = []
        outputs = {self.nodes[0].getnewaddress():0.15,self.nodes[0].getnewaddress():0.04}
        rawTx = self.nodes[1].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[1].fundrawtransaction(rawTx)

        #create same transaction over sendtoaddress
        txId = self.nodes[1].sendmany("", outputs)
        signedFee = self.nodes[1].getrawmempool(True)[txId]['fee']

        #compare fee
        feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
        assert(feeDelta >= 0 and feeDelta <= feeTolerance*19) #~19 inputs


        #############################################
        # multiple (~19) inputs tx test | sign/send #
        #############################################

        #again, empty node1, send some small coins from node0 to node1
        self.nodes[1].sendtoaddress(self.nodes[0].getnewaddress(), self.nodes[1].getbalance(), "", "", True)
        self.sync_all()
        self.nodes[0].generate(1)
        self.sync_all()

        for i in range(0,20):
            self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 0.01)
        self.nodes[0].generate(1)
        self.sync_all()

        #fund a tx with ~20 small inputs
        oldBalance = self.nodes[0].getbalance()

        inputs = []
        outputs = {self.nodes[0].getnewaddress():0.15,self.nodes[0].getnewaddress():0.04}
        rawTx = self.nodes[1].createrawtransaction(inputs, outputs)
        fundedTx = self.nodes[1].fundrawtransaction(rawTx)
        fundedAndSignedTx = self.nodes[1].signrawtransaction(fundedTx['hex'])
        txId = self.nodes[1].sendrawtransaction(fundedAndSignedTx['hex'])
        self.sync_all()
        self.nodes[0].generate(1)
        self.sync_all()
        assert_equal(oldBalance+Decimal('500.19000000'), self.nodes[0].getbalance()) #0.19+block reward

        #####################################################
        # test fundrawtransaction with OP_RETURN and no vin #
        #####################################################

        rawtx   = "0100000000010000000000000000066a047465737400000000"
        dec_tx  = self.nodes[2].decoderawtransaction(rawtx)

        assert_equal(len(dec_tx['vin']), 0)
        assert_equal(len(dec_tx['vout']), 1)

        rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
        dec_tx  = self.nodes[2].decoderawtransaction(rawtxfund['hex'])

        assert_greater_than(len(dec_tx['vin']), 0) # at least one vin
        assert_equal(len(dec_tx['vout']), 2) # one change output added


        ##################################################
        # test a fundrawtransaction using only watchonly #
        ##################################################

        inputs = []
        outputs = {self.nodes[2].getnewaddress() : watchonly_amount / 2}
        rawtx = self.nodes[3].createrawtransaction(inputs, outputs)

        result = self.nodes[3].fundrawtransaction(rawtx, {'includeWatching': True })
        res_dec = self.nodes[0].decoderawtransaction(result["hex"])
        assert_equal(len(res_dec["vin"]), 1)
        assert_equal(res_dec["vin"][0]["txid"], watchonly_txid)

        assert("fee" in result.keys())
        assert_greater_than(result["changepos"], -1)

        ###############################################################
        # test fundrawtransaction using the entirety of watched funds #
        ###############################################################

        inputs = []
        outputs = {self.nodes[2].getnewaddress() : watchonly_amount}
        rawtx = self.nodes[3].createrawtransaction(inputs, outputs)

        # Backward compatibility test (2nd param is includeWatching)
        result = self.nodes[3].fundrawtransaction(rawtx, True)
        res_dec = self.nodes[0].decoderawtransaction(result["hex"])
        assert_equal(len(res_dec["vin"]), 2)
        assert(res_dec["vin"][0]["txid"] == watchonly_txid or res_dec["vin"][1]["txid"] == watchonly_txid)

        assert_greater_than(result["fee"], 0)
        assert_greater_than(result["changepos"], -1)
        assert_equal(result["fee"] + res_dec["vout"][result["changepos"]]["value"], watchonly_amount / 10)

        signedtx = self.nodes[3].signrawtransaction(result["hex"])
        assert(not signedtx["complete"])
        signedtx = self.nodes[0].signrawtransaction(signedtx["hex"])
        assert(signedtx["complete"])
        self.nodes[0].sendrawtransaction(signedtx["hex"])
        self.nodes[0].generate(1)
        self.sync_all()

        #######################
        # Test feeRate option #
        #######################

        # Make sure there is exactly one input so coin selection can't skew the result
        assert_equal(len(self.nodes[3].listunspent(1)), 1)

        inputs = []
        outputs = {self.nodes[2].getnewaddress() : 1}
        rawtx = self.nodes[3].createrawtransaction(inputs, outputs)
        result = self.nodes[3].fundrawtransaction(rawtx) # uses min_relay_tx_fee (set by settxfee)
        result2 = self.nodes[3].fundrawtransaction(rawtx, {"feeRate": 2*min_relay_tx_fee})
        result3 = self.nodes[3].fundrawtransaction(rawtx, {"feeRate": 10*min_relay_tx_fee})
        result_fee_rate = result['fee'] * 1000 / count_bytes(result['hex'])
        assert_fee_amount(result2['fee'], count_bytes(result2['hex']), 2 * result_fee_rate)
        assert_fee_amount(result3['fee'], count_bytes(result3['hex']), 10 * result_fee_rate)

if __name__ == '__main__':
    RawTransactionsTest().main()